Mysti, the Women and Children's hospital in Adelaide did a study ( you can read about it on their website) where they found that ginger significantly reduced severity of M/S (by about 50%) in the majority of cases, whether mild or severe. They did a similar thing with B6, and Blackmores has a morning sickness formula that contains the ginger and the B6 together in the dosage amts recommended by these studies.

I have some of these and will take them religiously and hopefully we can avoid the worst of it this time round (I'm already craving ginger, can't get enough ginger beer and ordered Ginger Chicken at the Chinese place last night, it was supposed to be for sharing but I practically ate the LOT)!! If you don't like ginger the tablets are the way to go, I reckon.
:-)